From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH for-4.12 v2 15/17] xen/arm: p2m: Add support for preemption in p2m_cache_flush_range Date: Fri, 7 Dec 2018 14:11:19 -0800 (PST) Message-ID: References: <20181204202651.8836-1-julien.grall@arm.com> <20181204202651.8836-16-julien.grall@arm.com> <2c917b48-9205-11f8-b9ac-313f242c7f97@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gVOLD-0007uh-P6 for xen-devel@lists.xenproject.org; Fri, 07 Dec 2018 22:11:23 +0000 In-Reply-To: <2c917b48-9205-11f8-b9ac-313f242c7f97@arm.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Julien Grall Cc: xen-devel@lists.xenproject.org, Stefano Stabellini List-Id: xen-devel@lists.xenproject.org T24gRnJpLCA3IERlYyAyMDE4LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4gPiA+IEBAIC0xNTQ3LDYg KzE1NTEsMjUgQEAgaW50IHAybV9jYWNoZV9mbHVzaF9yYW5nZShzdHJ1Y3QgZG9tYWluICpkLCBn Zm5fdAo+ID4gPiBzdGFydCwgZ2ZuX3QgZW5kKQo+ID4gPiAgICAgICAgIHdoaWxlICggZ2ZuX3go c3RhcnQpIDwgZ2ZuX3goZW5kKSApCj4gPiA+ICAgICAgIHsKPiA+ID4gKyAgICAgICAvKgo+ID4g PiArICAgICAgICAgKiBDbGVhbmluZyB0aGUgY2FjaGUgZm9yIHRoZSBQMk0gbWF5IHRha2UgYSBs b25nIHRpbWUuIFNvIHdlCj4gPiA+ICsgICAgICAgICAqIG5lZWQgdG8gYmUgYWJsZSB0byBwcmVl bXB0LiBXZSB3aWxsIGFyYml0cmFyaWx5IHByZWVtcHQgZXZlcnkKPiA+ID4gKyAgICAgICAgICog dGltZSBjb3VudCByZWFjaCA1MTIgb3IgYWJvdmUuCj4gPiA+ICsKPiA+ID4gKyAgICAgICAgICoK PiA+ID4gKyAgICAgICAgICogVGhlIGNvdW50IHdpbGwgYmUgaW5jcmVtZW50ZWQgYnk6Cj4gPiA+ ICsgICAgICAgICAqICAtIDEgb24gcmVnaW9uIHNraXBwZWQKPiA+ID4gKyAgICAgICAgICogIC0g MTAgZm9yIGVhY2ggcGFnZSByZXF1aXJpbmcgYSBmbHVzaAo+ID4gCj4gPiBXaHkgdGhpcyBjaG9p Y2U/IEEgcGFnZSBmbHVzaCBzaG91bGQgY29zdCBtdWNoIG1vcmUgdGhhbiAxMHggYSByZWdpb24K PiA+IHNraXBwZWQsIG1vcmUgbGlrZSAxMDB4IG9yIDEwMDB4LiBJbiBmYWN0LCBkb2luZyB0aGUg ZnVsbCBsb29wIHdpdGhvdXQKPiA+IGNhbGxpbmcgZmx1c2hfcGFnZV90b19yYW0gc2hvdWxkIGJl IGNoZWFwIGFuZCBmYXN0LCByaWdodD8uCj4gCj4gSXQgaXMgY2hlYXBlciB0aGFuIGEgZmx1c2gg b2YgdGhlIHBhZ2UgYnV0IGl0IHN0aWxsIGhhcyBhIGNvc3QuIFlvdSBoYXZlIHRvCj4gd2FsayB0 aGUgc3RhZ2UtMiBpbiBzb2Z0d2FyZSB0aGF0IHdpbGwgcmVxdWlyZSB0byBtYXAgdGhlIHRhYmxl cy4gQXMgYWxsIHRoZQo+IG1lbW9yeSBpcyBub3QgbWFwcGVkIGluIHRoZSBoeXBlcnZpc29yIG9u IGFybTMyIHRoaXMgd2lsbCByZXF1aXJlIGEgbWFwL3VubWFwCj4gb3BlcmF0aW9uLiBPbiBhcm02 NCwgc28gZmFyIHRoZSBmdWxsIG1lbW9yeSBpcyBtYXBwZWQsIHNvIHRoZSBtYXAvdW5tYXAgaXMK PiBwcmV0dHkgbXVjaCBhIE5PUC4KCkdvb2QgcG9pbnQsIGFjdHVhbGx5IHRoZSBjb3N0IG9mIGFu ICJlbXB0eSIgaXRlcmF0aW9uIGlzIHNpZ25pZmljYW50bHkKZGlmZmVyZW50IG9uIGFybTMyIGFu ZCBhcm02NC4KCgo+ID4gSSB3b3VsZDoKPiA+IAo+ID4gLSBub3QgaW5jcmVhc2UgY291bnQgb24g cmVnaW9uIHNraXBwZWQgYXQgYWxsCj4gPiAtIGluY3JlYXNlIGl0IGJ5IDEgb24gZWFjaCBwYWdl IHJlcXVpcmluZyBhIGZsdXNoCj4gPiAtIHNldCB0aGUgbGltaXQgbG93ZXIsIGlmIHdlIGdvIHdp dGggeW91ciBwcm9wb3NhbCBpdCB3b3VsZCBiZSBhYm91dCA1MCwKPiA+ICAgIEkgYW0gbm90IHN1 cmUgd2hhdCB0aGUgbGltaXQgc2hvdWxkIGJlIHRob3VnaAo+IEkgZG9uJ3QgdGhpbmsgeW91IGNh biBhdm9pZCBpbmNyZW1lbnRpbmcgY291bnQgb24gcmVnaW9uIHNraXBwZWQuIFdoaWxlIG9uZQo+ IGxvb2t1cCBpcyBwcmV0dHkgY2hlYXAsIGFsbCB0aGUgbG9va3VwcyBmb3IgaG9sZSBhZGRlZCB0 b2dldGhlciBtYXkgcmVzdWx0IHRvCj4gYSBwcmV0dHkgbG9uZyB0aW1lLgoKVGhpbmtpbmcgb2Yg dGhlIGFybTMyIGNhc2Ugd2hlcmUgbWFwL3VubWFwIG5lZWQgdG8gYmUgZG9uZSwgeW91IGFyZQpy aWdodC4KCgo+IEV2ZW4gaWYgc3RhZ2UtMiBtYXBwaW5ncyBhcmUgaGFuZGxlZCBieSB0aGUgaHlw ZXJ2aXNvciwgdGhlIGd1ZXN0IGlzIHN0aWxsCj4gc29tZXdoYXQgaW4gY29udHJvbCBvZiBpdCBi ZWNhdXNlIGl0IGNhbiBiYWxsb29uIGluL291dCBwYWdlcy4gVGhlIG9wZXJhdGlvbgo+IG1heSBy ZXN1bHQgdG8gc2hhdHRlciBzdGFnZS0yIG1hcHBpbmdzLgo+IAo+IEl0IHdvdWxkIGJlIGZlYXNp YmxlIGZvciBhIGd1ZXN0IHRvIHNoYXR0ZXIgMUdCIG9mIG1lbW9yeSBpbiA0S0IgbWFwcGluZ3Mg aW4KPiBzdGFnZS0yIGVudHJpZXMgYW5kIHRoZW4gcmVtb3ZlIGFsbCB0aGUgZW50cmllcy4gVGhp cyBtZWFucyB0aGUgc3RhZ2UtMiB3b3VsZAo+IGNvbnRhaW5zIDI2MjE0NCBob2xlcy4gVGhpcyB3 b3VsZCByZXN1bHQgdG8gMjYyMTQ0IGl0ZXJhdGlvbnMsIHNvIG5vIG1hdHRlcgo+IGhvdyBjaGVh cCBpdCBpcyB0aGUgcmVzdWx0aW5nIHRpbWUgc3BlbnQgd2l0aG91dCBwcmVlbXB0aW9uIGlzIGdv aW5nIHRvIGJlCj4gcXVpdGUgaW1wb3J0YW50LgoKT0sKCgo+IFRoZSBjaG9pY2UgaW4gdGhlIG51 bWJlcnMgMSB2cyAxMCBpcyBwcmV0dHkgbXVjaCByYW5kb20uIFRoZSBxdWVzdGlvbiBpcyBob3cK PiBvZnRlbiB3ZSB3YW50IHRvIGNoZWNrIGZvciBwZW5kaW5nIHNvZnRpcnEuIFRoZSBjaGVjayBp cyBwcmV0dHkgbXVjaCB0cml2aWFsLAo+IHlldCBpdCBoYXMgYSBjb3N0IHRvIHByZWVtcHQuIFdp dGggdGhlIGN1cnJlbnQgc29sdXRpb24sIHdlIGNoZWNrIHByZWVtcHRpb24KPiBldmVyeSA1MTIg aG9sZXMgb3IgNTEgcGFnZXMgZmx1c2hlZCAofjIwNEtCIGZsdXNoZWQpLgo+IAo+IFRoaXMgc291 bmRzIG9rIHRvIG1lLiBGZWVsIGZyZWUgdG8gc3VnZ2VzdCBiZXR0ZXIgbnVtYmVyLgoKT25lIHN1 Z2dlc3Rpb24gaXMgdGhhdCB3ZSBtaWdodCB3YW50IHRvIHRyZWF0IHRoZSBhcm0zMiBjYXNlIGRp ZmZlcmVudGx5CmZyb20gdGhlIGFybTY0IGNhc2UsIGdpdmVuIHRoZSBkaWZmZXJlbnQgY29zdCBv ZiBtYXBwaW5nL3VubWFwcGluZyBwYWdlcwpkdXJpbmcgdGhlIHdhbGsuIFdvdWxkIGl0IGJlIGZh aXIgdG8gc2F5IHRoYXQgaWYgYW4gYXJtNjQgZW1wdHkKaXRlcmF0aW9uIGlzIHdvcnRoICIxIiB1 bml0IG9mIHdvcmssIHRoZW4gYW4gYXJtMzIgZW1wdHkgaXRlcmF0aW9uIGlzCndvcnRoIGF0IGxl YXN0ICIyIiB1bml0IG9mIHdvcms/IE9yIG1vcmU/IE15IGd1dCBmZWVsaW5nIGlzIHRoYXQgaXQg aXMKbW9yZSBsaWtlOgoKZW1wdHkgYXJtNjQ6ICAgICAgIDEKZW1wdHkgYXJtMzI6ICAgICAgIDUK Zmx1c2ggYXJtMzIvYXJtNjQ6IDEwCgpPciBldmVuOgoKZW1wdHkgYXJtNjQ6ICAgICAgIDEKZW1w dHkgYXJtMzI6ICAgICAgIDEwCmZsdXNoIGFybTMyL2FybTY0OiAyMAoKYW5kIHRoZSBvdmVyYWxs IGxpbWl0cyBmb3IgY2hlY2tzIGNvdWxkIGJlIDUxMiBvciAxMDI0IGxpa2UgeW91CnN1Z2dlc3Rl ZC4KCkJ1dCBJIGRvbid0IHJlYWxseSBrbm93LCB3ZSB3b3VsZCBuZWVkIHByZWNpc2UgYmVuY2ht YXJrcyB0byBoYXZlIGFuCmlkZWEgYWJvdXQgd2hhdCBhcmUgdGhlIGJlc3QgbnVtYmVycyBmb3Ig dGhpcy4gSSBhbSBub3Qgc3VnZ2VzdGluZyB5b3UKaGF2ZSB0byBkbyBhbnkgbW9yZSBiZW5jaG1h cmtzIG5vdywgd2UnbGwganVzdCBoYW5kLXdhdmUgaXQgZm9yIG5vdy4KCgoKPiA+ID4gKyAgICAg ICAgICovCj4gPiA+ICsgICAgICAgIGlmICggY291bnQgPj0gNTEyICkKPiA+ID4gKyAgICAgICAg ewo+ID4gPiArICAgICAgICAgICAgaWYgKCBzb2Z0aXJxX3BlbmRpbmcoc21wX3Byb2Nlc3Nvcl9p ZCgpKSApCj4gPiA+ICsgICAgICAgICAgICB7Cj4gPiA+ICsgICAgICAgICAgICAgICAgcmMgPSAt RVJFU1RBUlQ7Cj4gPiA+ICsgICAgICAgICAgICAgICAgYnJlYWs7Cj4gPiA+ICsgICAgICAgICAg ICB9Cj4gPiA+ICsgICAgICAgICAgICBjb3VudCA9IDA7Cj4gPiAKPiA+IE5vIG5lZWQgdG8gc2V0 IGNvdW50IHRvIDAgaGVyZQo+IAo+IFdlbGwsIHRoZSBjb2RlIHdvdWxkIG5vdCBkbyB0aGUgc2Ft ZSBoZXJlLiBJZiB5b3UgZG9uJ3QgcmVzZXQgdG8gMCwgeW91IHdvdWxkCj4gY2hlY2sgc29mdGly cV9wZW5kaW5nKCkgYWxsIHRoZSBpdGVyYXRpb24gd2hlbiBjb3VudCByZWFjaGVkIDUxMi4KPiAK PiBJZiB5b3UgcmVzZXQgMCwgeW91IHdpbGwgYXZvaWQgdG8gY2hlY2sgc29mdGlycV9wZW5kaW5n KCkgdW50aWwgdGhlIG5leHQgdGltZQo+IGNvdW50IHJlYWNoZWQgNTEyLgo+IAo+IFRoZSBib3Ro IGFyZSBhY3R1YWxseSB2YWxpZC4gSXQganVzdCBhIG1hdHRlciBvbiB3aGV0aGVyIHdlIGFyZSBh c3N1bWluZyB0aGF0Cj4gYSBzb2Z0aXJxIHdpbGwgaGFwcGVuIHNvb24gYWZ0ZXIgcmVhY2hpbmcg NTEyPwoKTXkgY29tbWVudCB3YXMgd3JvbmcsIHRoZSBjb2RlIGlzIHJpZ2h0IGFzIGlzLCBJIHRo aW5rIHdlIHdhbnQgdG8gY2hlY2sKc29mdGlycV9wZW5kaW5nIGV2ZXJ5IDUxMiBpdGVyYXRpb25z LgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRl dmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9s aXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==